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參數資料
型號: P89LPC920
廠商: NXP Semiconductors N.V.
英文描述: 8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
中文描述: 8位微控制器兩個小時80C51的核心2鍵盤/ 4 KB的/ 8 KB的3伏的低功耗Flash 256 - RAM的字節數據
文件頁數: 6/45頁
文件大小: 877K
代理商: P89LPC920
Philips Semiconductors
P89LPC920/921/922
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 06 — 21 November 2003
6 of 45
9397 750 12285
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
5.2 Pin description
Table 3:
Symbol
P0.0 - P0.7
Pin description
Pin
1, 20, 19,
18, 17, 16,
14, 13
Type
I/O
Description
Port 0:
Port 0 is an 8-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 0 pins as inputs and outputs depends upon the port configuration
selected. Each port pin is configured independently. Refer to
Section 8.12.1 “Port
configurations”
and
Table 8 “DC electrical characteristics”
for details.
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt triggered inputs.
Port 0 also provides various special functions as described below:
P0.0 —
Port 0 bit 0.
CMP2 —
Comparator 2 output.
KBI0 —
Keyboard input 0.
P0.1 —
Port 0 bit 1.
CIN2B —
Comparator 2 positive input B.
KBI1 —
Keyboard input 1.
P0.2 —
Port 0 bit 2.
CIN2A —
Comparator 2 positive input A.
KBI2 —
Keyboard input 2.
P0.3 —
Port 0 bit 3.
CIN1B —
Comparator 1 positive input B.
KBI3 —
Keyboard input 3.
P0.4 —
Port 0 bit 4.
CIN1A —
Comparator 1 positive input A.
KBI4 —
Keyboard input 4.
P0.5 —
Port 0 bit 5.
CMPREF —
Comparator reference (negative) input.
KBI5 —
Keyboard input 5.
P0.6 —
Port 0 bit 6.
CMP1 —
Comparator 1 output.
KBI6 —
Keyboard input 6.
P0.7 —
Port 0 bit 7.
T1 —
Timer/counter 1 external count input or overflow output.
KBI7 —
Keyboard input 7.
1
I/O
O
I
I/O
I
I
I/O
I
I
I/O
I
I
I/O
I
I
I/O
I
I
I/O
O
I
I/O
I/O
I
20
19
18
17
16
14
13
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